Furnace.



I PATBNTED JAN. 28, 1908. E. N. SNITJER.

FURNACE.

APPLICATION FILEDvNOV.l6, 1907.

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UNITED STATES PATENT oFFIcE.

EDWIN N. SNITJER, OF PITTSBURG, PENNSYLVANIA.

FURN/ACE.

Patented J an. 28, 1908.

Original application filed November 5, 1906. Serial No. 342.153 Divided and this application filed November 16 1907.

v a Serial No. 402430.

To all whom it may concern:

Be it known that I, EDWIN N. SNITJER, a citizen of the United States, residing at Pittsburg, in the State of Pennsylvania, have'invented a certain new and useful Improvement in Furnaces, of which the following is a specification.

My invention relates to heaters burning gases or vapors and articularly to means for preventing downdra t in heaters attached directly to a register and to means for causing complete combustion of the gases, as well as other advantages which will hereinafter appear.

This application is a division of my copending application No. 342 1 53 filed November 5th, 1906, and the burneritself herein described is claimed in the parent application, and not here.

In the accom anyiiig drawings Figure 1 is I a vertical centra section illustrating a heater with my improvement, and Fig. 2 shows a modification of the connection between the heating furnace and the register.-

In this class of heaters here illustrated as a gas furnace, the heater is attached directly to a register in the fioor and the products of combustion are emptied into the room to be heated. It is therefore highly essential that the combustion of gas be complete and steady'and reliable, and also highlyim ortant that all eflects of downdraft through the register be avoided.

In Fig.- 1 I have illustrated a simple form of furnace comprising a casing 3 preferably made with a conical top 4 to fit the outlet connection. This casing contains a burner 5 which is fed with air either by erforations through the casing or else throug the perforated conical bottomo6. Above the burner is a reverberatory hood which accomplishes 1 complete combustion of the gases by confining them until an am le supply of air has been attained. It wil be noted'thatthe flame is provided with air inside as-well as outside and that a current of air follows the flame into the hood and there reverberates with the-gas some time before the burned gases escape. For the perfect operation of this reverberatory hood the currents of air in the hood should besteady and undisturbed, and particularly downdrafts should be avoided. At the top of .the casing 3, 4, I preferably provide anemow pipe 8 which connects with a tee pipe 9,

and the tee ipe has a larger pipe 10 connected t ereto and extending downwardly as shown directly under the register. The pi e 10 is fitted into the box 1 1 which contains t e register vanes 12. In this instance the part 11 isa simple metal box and the opening therefrom is directly downward; it will be noted that the furnace does not hang be neath the re ister but to one side of it so that no trash or irt can fall into the furnace and also allowing a direct straightawa downdraft past and apart from the o enlng from the furnace casing. In case of accidental downdraft the larger pipe 10 admits of es-q cape of the air without entering through pipe 9, and this construction has been proven 11'1 ractice to entirely avoid any effect on the urner in the furnace by reason of downdraft.

In Fig. 2 I show a modified form of the register box 11 in which the casing 3, 4, opens directly into the bottom of the box, but provision for escape of downdraft is made by the holes 13 and 14 as will be evident.

There has been found in ractice to be great danger from the use of this type of gas heater because of the accidental downdraft through the register, which blows out the gas flame and thereafter without warning the gas itself continues to flow into the room. Moreover, the corn lete combustion device will not operate e ciently when the currents of air in-the casing are interfered with in any way. It will be seen'that by my construction I entirely avoid the downdraft and at the same time insure the burnerand reverberatory hood against interference by accidental drafts.

The com lete combustion device itself is not claime herein but in the parent application above referred to.

Having thus described my invention and illustrated. its use, what I claim as new and desire to secure by Letters Patent, is thefollowing:

1. The combination with a furnace, and a hot air register, of a connection between the furnace and register having. one opening into the furnace and a supplementary direct downward draft opening from the register independent'of the furnace.

2. The combination with a furnace adapted to discharge theproducts of combustion directly through a register into a room, of a register and a connection between the furnace and the register comprising a casing having one opening from the furnace and a separate opening downward past the furnace opening, to allow direct escape of downdraft.

3. A register and a furnace having a casing, an outlet pipe from the'casing having two branches, one connected with the register, and the other opening directly downward from the register to allow escape of downdraft.

4. The combination with a furnace comprising a casing, a burner and a reverberatory hood therein over the burner, of an outlet for the casing comprising a register box I and a pipe connected thereto and to the furnace casing and having a separate direct downdraft passage to-one side of the opening from the casing, whereby downdrafts are prevented from interfering with the opera tion of the burner and hood in the casing.

5. An attachment for heating vfurnaces com rising a register box having a downwar 1y directed extension and a side pipe connection between the furnace and said box entering the side wall of the register box extension;

6. The combination with a register, of a and an elbow and tee pipe connect on between the furnace and t e register, whereby is provided a direct downdraft from the- EDWIN N. SNITJER. Witnesses:

1 1W. H. CLAY, FRED STAUB.

presence of the p furnace beneath but to one side of the same, v 

